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KASAN: stack-out-of-bounds Read in rcu_cblist_dequeue

Status: closed as invalid on 2018/07/06 07:38
Subsystems: rcu
[Documentation on labels]
First crash: 2397d, last: 2397d

Sample crash report:
==================================================================
PANIC: double fault, error_code: 0x0
BUG: KASAN: stack-out-of-bounds in rcu_cblist_dequeue+0xaa/0xe0 kernel/rcu/rcu_segcblist.c:54
CPU: 1 PID: 29073 Comm: syz-executor3 Not tainted 4.18.0-rc3+ #47
Read of size 8 at addr ffff88019bb5ea00 by task swapper/0/0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline]
RIP: 0010:perf_trace_lock_acquire+0xe6/0x9a0 include/trace/events/lock.h:13

Code: 18 
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc3+ #47
48 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
89 85 
Call Trace:
70 fe 
 <IRQ>
ff ff 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
48 c1 
e8 03 
80 3c 
10 00 
0f 85 
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
8a 05 
00 00 
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
49 8b 
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
79 18 
 rcu_cblist_dequeue+0xaa/0xe0 kernel/rcu/rcu_segcblist.c:54
48 85 
ff 0f 
 rcu_do_batch kernel/rcu/tree.c:2556 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2818 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2785 [inline]
 rcu_process_callbacks+0xf7e/0x1850 kernel/rcu/tree.c:2802
84 72 
04 00 
00 4c 
89 8d 
58 fe 
ff ff 
<e8> f5 
a9 33 
06 4c 
8b 
 __do_softirq+0x2e8/0xb17 kernel/softirq.c:288
8d 58 
fe ff 
ff 41 
89 c6 
83 c0 
01 c1 
e0 10 
83 
RSP: 0018:ffff88019b350ff8 EFLAGS: 00010086
RAX: 1ffffffff11f24c7 RBX: 1ffff1003366a209 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff88f92620 RDI: ffffffff87ebd260
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x1d1/0x200 kernel/softirq.c:408
RBP: ffff88019b3511d0 R08: 0000000000000002 R09: ffffffff88f92620
R10: ffffffff815dfe10 R11: dffffc0000000000 R12: ffff88019b3511a8
 exiting_irq arch/x86/include/asm/apic.h:527 [inline]
 smp_apic_timer_interrupt+0x186/0x730 arch/x86/kernel/apic/apic.c:1052
R13: 0000000000000002 R14: 0000000000000000 R15: ffffffff88f7b740
FS:  00007f89adc76700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88019b350fe8 CR3: 000000019fe01000 CR4: 00000000001406e0
DR0: 00000000200001c0 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/07/06 02:52 bpf-next 6fcf9b1d4d6c d3b2a0e2 .config console log report ci-upstream-bpf-next-kasan-gce
* Struck through repros no longer work on HEAD.